Subaru Legacy 2005 Service Manual page 2217

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK HARNESS CONNECTOR BETWEEN
TCM AND ATF TEMPERATURE SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from TCM.
3) Measure the resistance between TCM con-
nector terminals.
Connector & terminal
(B54) No. 21 — No. 9:
2 CHECK HARNESS CONNECTOR BETWEEN
TCM AND ATF TEMPERATURE SENSOR.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B54) No. 21 — Chassis ground:
3 CHECK HARNESS.
Measure the resistance between TCM connec-
tor terminals while shaking the harness.
Connector & terminal
(B54) No. 21 — No. 9:
4 CHECK HARNESS CONNECTOR BETWEEN
TCM AND ATF TEMPERATURE SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmis-
sion.
3) Measure the resistance of harness
between TCM connector and chassis ground.
Connector & terminal
(B54) No. 21 — Chassis ground:
5 CHECK HARNESS CONNECTOR BETWEEN
TCM AND ATF TEMPERATURE SENSOR.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B54) No. 9 — Chassis ground:
6 CHECK ATF TEMPERATURE SENSOR.
Measure the resistance between transmission
connector terminals.
Connector & terminal
(T4) No. 11 — No. 15:
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Is the resistance more than
500 Ω?
Is the resistance more than 1
MΩ?
Does the resistance change?
Is the resistance more than 1
MΩ?
Is the resistance more than 1
MΩ?
Is the resistance more than
500 Ω?
4AT(diag)-45
Yes
Go to step 2. Go to step 4.
Go to step 3. Go to step 4.
Go to step 4. Replace the TCM.
<Ref. to 4AT-66,
Transmission Con-
trol Module
(TCM).>
Go to step 5. Repair the short
circuit of harness
between TCM and
transmission har-
ness.
Go to step 6. Repair the short
circuit of harness
between TCM and
transmission har-
ness.
Even if the SPORT Go to step 7.
indicator light is
blinking, the cir-
cuit has returned
to normal condi-
tion at this time. A
temporary short
circuit of connector
or harness may be
the cause. Repair
the harness or
connector.
No